Abstract: A toner for developing an electrostatic image is disclosed. The toner comprises colored particles containing a resin and a colorant, the volume average particle diameter of said colored particles is 3 to 9 &mgr;m, the shape coefficient of said colored particles, which is described by the formula below, is 1.3 to 2.2, and the ratio of toner particles having a shape coefficient of 1.5 to 2.0 is at least 80 percent by number. Shape coefficient=[(maximum diameter/2)2×&pgr;]/(projection area) A developer and image forming method employing the toner are also disclosed.

Abstract: A toner for electrophotography is disclosed. The toner comprises a binder resin and a colorant and a wax in amount of 0.5 to 8 percent by weight, and adhesion power index of wax particles to toner particles is between 0.7 and 2.2. The toner improves the durability of the developer material and a photoreceptor, minimizes image smear at high temperature and humidity, and exhibits excellent fixation as well as offsetting resistance.

Abstract: A toner for developing an electrostatic image is disclosed. The toner comprises a colored particle containing a binder resin, a colorant, and a low molecular weight polypropylene particle, which has a content of the low molecular weight polypropylene particle of 0.3 to 8.0 percent by weight, a free polypropylene index measured by a centrifugal method of from 0.1 to 0.7 and a free polypropylene index measured by a natural sedimentation method of not more than 0.1.

Abstract: A toner for electrophotography is disclosed. The toner comprises a binder resin and a colorant and a wax in amount of 0.5 to 8 percent by weight, and adhesion power index of wax particles to toner particles is between 0.7 and 2.2. The toner improves the durability of the developer material and a photoreceptor, minimizes image smear at high temperature and humidity, and exhibits excellent fixation as well as offsetting resistance.

Abstract: A toner used for developing an electrostatic charge image containing a coloring agent, a quaternary ammonium salt compound and polyolefin is disclosed. The quaternary ammonium salt compound is represented by formula (A) and have solubility to water of not more than 2.0%, and number-averaged dispersed diameter of polyolefin is 0.1 .mu.m-1.0 .mu.m. The toner satisfies formula (1);(1) 17<D.sub.T /D.sub.CCA <90wherein, D.sub.T is a volume-averaged particle size of the toner particle, and D.sub.CCA represents a number-averaged diameter of quaternary ammonium salt compound dispersed in a toner particle. ##STR1## The definition is described in the specification.

Abstract: Disclosed is a developer for electrophotography, comprising a carrier and toner particles, whereinsaid carrier comprises a magnetic particle having thereon a resin coated layer, said magnetic particle including Fe.sub.2 O.sub.3 and an oxide compound of at least one kind of a light metal selected from the group consisting of lithium, beryllium, sodium, magnesium, potassium, calcium and rubidium, andwherein said toner particles have a compound represented by Formula (1), wherein an amount (g) of the compound on the surface (m.sup.2) of said toner particles, is 3.0.times.10.sup.-3 to 1.2.times.10.sup.-2 g/m.sup.2. : ##STR1## wherein, R.sup.1 through R.sup.4 independently represents an alkyl group having a carbon atom number of 1 to 18 or a benzyl group, A.sup.- represents an anion, provided that at least one of R.sup.1 through R.sup.4 represents an alkyl group having a carbon atom number of 8 to 18.

Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor comprises a conductive substrate and a photosensitive layer provided on the substrate. The photosensitive layer comprises titanylphthalocyanine having a peak at a Bragg angle 2.theta. of 27.2.degree..+-.2.degree. in the Cu-K.alpha. X ray-diffraction spectrum thereof and an alkyldiol which has 3 to 12 carbon atoms and the two hydroxyl group is bonded to carbon atoms arranged at different position in the molecular thereof. The amount of the diol is 0.1 to 1000 parts by weight per 100 parts by weight of the titanyl-phthalocyanine.